iReporter Emmanuel Mallo of Johnson City, New York, said he was frustrated when a McCain robocall awoke his son, causing him to burst into tears.

"You can't be waking up children ... to promote your political agenda," Mallo said. "People are going through stressful times."

Former Republican presidential candidate Rudy Giuliani is the star of a new robocall from the McCain campaign and the Republican National Committee.

In the call, the former federal prosecutor and New York mayor tries to paint Obama as soft on crime, saying the Democrat opposes "mandatory prison sentences for sex offenders, drug dealers and murderers."

"I live in Green Bay, and, like you, I've been getting sleazy phone calls and mail from John McCain and his supporters viciously -- and falsely -- attacking Barack Obama. I used to support John McCain because he honorably served our country, but this year he's running a dishonorable campaign," Watermolen says in the call.

Giuliani's robocall comes a week after the RNC and the McCain campaign sent out a robocall to swing-state voters highlighting the Democratic presidential candidate's connection to 1960s radical William Ayers. Fact check: Obama's ties to Ayers

The calls are part of a $70 million last Republican push to get out the vote for McCain, using calls, mailings and door-knocking in battleground states.

Biden on Tuesday challenged McCain to "stop those ads."

"If John McCain is serious when he said this morning, 'This election is about the economy,' then I say, John, take down your robocalls. Stop what you're doing, John. Debate the economy, not lies about Barack's character," he said.

But Dakin said voters can expect the calls to keep pouring in during the final days of campaigning.

"It's essentially the spam of this elections cycle. They've become so cheap, so ubiquitous, at every level of every race, so particularly if you live in a battleground state, our members are reporting getting 10 to 15 calls a day. That's only going to increase," he said.